Australia, officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It has a land area of 7,688,287 km2 (2,968,464 sq mi), making it the sixth-largest country in the world, and is the world's flattest and driest inhabited continent. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, including deserts in the interior and tropical rainforests along the coast.
The ancestors of Aboriginal Australians began arriving from Southeast Asia 50,000 to 65,000 years ago, during the Last Glacial Period. By the time of British settlement, Aboriginal Australians spoke more than 250 distinct languages and had one of the oldest living cultures in the world. Australia's written history commenced with Dutch exploration of most of the coastline in the 17th century. British colonisation began in 1788 with the establishment of the penal colony of New South Wales. By the mid-19th century, most of the continent had been explored by European settlers and five additional self-governing British colonies were established, each gaining responsible government by 1890. The colonies federated in 1901, forming the Commonwealth of Australia. This continued a process of increasing autonomy from the United Kingdom, highlighted by the Statute of Westminster Adoption Act 1942, and culminating in the Australia Act 1986.
Australia is a parliamentary democracy with a constitutional monarchy, and a federation comprising six states and ten territories. Its population of almost 29 million is highly urbanised and heavily concentrated on the eastern seaboard. Canberra is the nation's capital, while its most populous cities are Sydney and Melbourne, each with a population of more than five million. Australia's culture is diverse, and the country has one of the highest foreign-born populations in the world. It has a highly developed economy and one of the highest per capita incomes globally. Its abundant natural resources and well-developed international trade relations are crucial to the country's economy. It ranks highly for quality of life, health, education, economic freedom, civil liberties and political rights.
Australia is a middle power, and has the world's fourteenth-highest military expenditure. It is a member of international groups including: the United Nations, the G20, the OECD, the World Trade Organization, Asia-Pacific Economic Cooperation, the Pacific Islands Forum, the Pacific Community and the Commonwealth of Nations. Australia also participates in the defence, intelligence and security alliances ANZUS, AUKUS and Five Eyes. It is a major non-NATO ally of the United States.
The name Australia (pronounced in Australian English) is derived from the Latin Terra Australis Incognita ('unknown southern land'), a name used for a hypothetical continent in the Southern Hemisphere since ancient times. Several 16th-century cartographers used the word Australia on maps, but not to identify modern Australia.
When the Dutch began visiting and mapping Australia in the 17th century, they called the continent New Holland. The name Australia was popularised by the explorer Matthew Flinders, who circumnavigated the continent in 1803. However, when his account of his voyage was published in 1814, the name Terra Australis was used.
Governor of New South Wales Lachlan Macquarie officially recommended the name Australia to replace New Holland in December 1817. The British Admiralty adopted the name in 1824, and the British Parliament used it in legislation in 1828. The United Kingdom Hydrographic Office used the new name in The Australia Directory of 1830. The name "Commonwealth of Australia" for the new federation of the six former colonies was formalised in the Commonwealth of Australia Constitution Act 1900 (UK).
Colloquial names for Australia include "Oz", "Straya" and "Down Under".
Indigenous Australians comprise two broad groups:
Aboriginal Australians, who are the various Indigenous peoples of the Australian mainland and many of its islands, including Tasmania
Torres Strait Islanders, who are a distinct Melanesian people of Torres Strait Islands
Human habitation of the Australian continent is estimated to have begun 50,000 to 65,000 years ago, with the migration of people by land bridges and short sea crossings from what is now Southeast Asia. It is uncertain how many waves of immigration may have contributed to these ancestors of modern Aboriginal Australians. The Madjedbebe rock shelter in Arnhem Land is possibly the oldest site showing the presence of humans in Australia. The oldest human remains found are the Lake Mungo remains, which have been dated to approximately 42,000 years ago.
Aboriginal Australian culture is one of the oldest continuous cultures on Earth. At the time of first European contact, Aboriginal Australians belonged to wide range of societies, with diverse economies spread across at least 250 different language groups. Estimates of the Aboriginal population before British settlement range from 300,000 to 3 million. Aboriginal Australians cultures were (and remain) deeply connected with the land and the environment, with stories of The Dreaming maintained through oral tradition, songs, dance and paintings. Certain groups engaged in fire-stick farming, fish farming, and built semi-permanent shelters. These practices have variously been characterised as "hunter-gatherer", "agricultural", "natural cultivation" and "intensification".
Torres Strait Islander people first settled their islands at least 2,500 years ago. Culturally and linguistically distinct from mainland Aboriginal peoples, they were seafarers and obtained their livelihood from seasonal horticulture and the resources of their reefs and seas. Agriculture also developed on some islands and villages appeared by the 1300s. By the mid-18th century in northern Australia, contact, trade and cross-cultural engagement had been established between local Aboriginal groups and Makassan trepangers, visiting from present-day Indonesia.
European exploration and colonisation
In 1606 the crew of the Dutch ship, Duyfken, captained by Willem Janszoon, made the first documented European landing in Australia and contact with Aboriginal Australians. Later that year, Luís Vaz de Torres sailed to the north of Australia through Torres Strait, along New Guinea's southern coast. Abel Tasman's voyage of 1642 was the first known European expedition to reach Van Diemen's Land. On his second voyage of 1644, he mapped the north coast of Australia south of New Guinea. Following Tasman's voyages, the Dutch were able to make almost complete maps of Australia's northern and western coasts and much of its southern and south-eastern Tasmanian coasts. They named the continent New Holland.
In 1770, Captain James Cook sailed along and mapped the east coast, which he named "New South Wales" and claimed for Great Britain. In 1786, the British government announced its intention to establish a penal colony in New South Wales. On 26 January 1788, the First Fleet commanded by Captain Arthur Phillip, arrived at Sydney Cove, Port Jackson. A camp was established and the Union Flag raised and the date later became Australia's national day.
Most early settlers were convicts, transported for petty crimes and assigned as labourers or servants to "free settlers" (willing immigrants). Once emancipated, convicts tended to integrate into colonial society. Aboriginal resistance, convict rebellions and bushranging were sometimes suppressed under martial law. The 1808 Rum Rebellion, carried out by officers of the New South Wales Corp, led to a temporary military junta. During the next two decades, social and economic reforms, together with the establishment of a Legislative Council and Supreme Court, saw the penal colony transition to a civil society.